6909375691 has 8 divisors (see below), whose sum is σ = 6987585024. Its totient is φ = 6831538560.

The previous prime is 6909375677. The next prime is 6909375703. The reversal of 6909375691 is 1965739096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6909375691 - 2¹¹ = 6909373643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6909375601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55630 + ... + 130051.

It is an arithmetic number, because the mean of its divisors is an integer number (873448128).

Almost surely, 2^6909375691 is an apocalyptic number.

6909375691 is a deficient number, since it is larger than the sum of its proper divisors (78209333).

6909375691 is a wasteful number, since it uses less digits than its factorization.

6909375691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186101.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The square root of 6909375691 is about 83122.6544992399. The cubic root of 6909375691 is about 1904.6401536698.

The spelling of 6909375691 in words is "six billion, nine hundred nine million, three hundred seventy-five thousand, six hundred ninety-one".